Time signaling system



Aug. 29, 1933.

H. E. l-lrsRsl-n-:Y`

TIME SIGNALING SYSTEM Fired May 18. 1931 3 Sheet-s-Sheet' 2 vlaf- EEE E. H11-:11:5

Aug. 29, 1933. H. E. HERsHEY TIME SIGNALING SYSTEM Filed May 18, 1931 3 Sheets-Sheet 3 IEEE-nii? Ham-H E. Hrsha @MW 51227 n H4 :moese WNDOl Patented Aug. 29, 1933 TIME SIGNALING SYSTEM Harry E. Hershey, Oak Park, Ill., assigner, by

mesne assignments,

to Associated Electric Laboratories, Inc., Chicago, Ill., a corporation of Delaware 4 Application May 18, 1931. 'Serial No. 538,153

29 Claims.

The present invention relates in general to time signaling systems, being concerned more particularlya'ith a time signaling device for telephone systems. Reference is made here to the 5 John I. Bellamy et al. application, Serial No. 478,324, on which this invention is an\improve ment.

The object of the invention, broadly stated, is the provision of new and improved circuits nand apparatus for transmitting the time of day to subscribers in a telephone system by means of chimes or gongs. 'I'he subscribers, upon being connected to the time signaling device, 'will be under the impression that they' are listening to 5 a grandfathers clock in the telephone exchange striking out the hours and minutes.

One feature of the invention is the arrangement for providing an efilcient and reliable arrangement for transmitting' the sound of the 0 chimes to the connected subscriber.

Another feature is the arrangement for regis-` tering certain hours of the day by means of a step-by-step rotary switch and for registering the remaining hours of -the day by means of relays, after the rotary switch has been positioned to a predetermined position.-

Another feature is the arrangement provided in the holding-bridge circuit for starting the transmitting portion of the time signaling device. f

Another feature is tharrangement for affecting the registers to perform successive controlling operations.

Another feature is the arrangementdor varying 5&5 the striking speed of the various chimes as de= sired. With this arrangement it will be comparatively easy to differentiate between the various chimes not only by the pitch but also by the frequency of the striking.

Another feature is vthe arrangement for connecting up the various chimes so that they may "be operated in any sequence or combination.

A stillfurther feature is the arrangement for varying the length of a special tone signal which is indicative of the numeral 0 or zero. f The foregoing objects and features together with others not specifically mentioned at this time will befurther discussed in connection with the detailed description of the operation of the various circuits. f d

. .The accompanying drawings comprising Figs.

' 1 -to 3, Iinclusive, show by means of the usual circuit diagrams a sumcient .amount of equipment embodying the invention to permit the 5 me to be redduy described and understood.

be provided as are required to handle the traffic vReferring now tothe drawings, in Fig. 1 is shown a holding-bridge circuit HBwhich is accessible to subscribers in an automatic telephoneL system. As many holding-bridge circuits may o0 to the time signaling equipment. Each holding bridge has an induction coil, similar to induction coil 39, whose secondary winding is normally associated with an artificial line. The primary winding of all induction coils are connected in series and bridged across the chime circuit. over conductors 40 and 41. This arrangement insures that the volume of sdund, audible@ the s ubscriber, will remain the same, irrespective of the number of simultaneous connections. l

substation T is connected with the telephone exchange by line conductors 9 and 10 which terminate in line switch LS. The lineswitch, indicated in the drawings by the rectangle LS, is aswitch of the well known. rotary, type whoseV wipers have no normal position and move in a forward direction only. As is well known, the function of -the` lineswitch is to extend its associated line to an idle first selector switch when the receiver is raised at the substation'` initiating a call. One of/ the first selector switches to which the lineswitch LS has access, incommon with similar lineswitches, is indicated inr the drawings by rectangle S.' The selector used can 86. .be' any of the standard type selectors imed in regular practice, such as the selector shown in Fig. 63 and described on pages 62 to 65. inclusive, of Smith and Campbells Automatic Telephony, second edition, published in 1921 by 90, McGraw-Hill Book. Company, Incorporated, New

York. yThe lineswitch and selector used in a system of this kind may be any, of the 1ine switches or selector switches well known tothe art, as these switches form no part of thefinvention to be disclosed. f

Conductors 14, 15, andv16 of the holding-bridge circuit HB are wired to the bank contacts, such as 11, 12, and 13 of any selector switch having access to time ksignaling device. X

The equipment shown to the right of thefdotted line AA, together with the equipment shown in Figs. 2 and 3, constitutesfthe time signaling device. Thek three gongs or chimes C1, C2,' and C3 are the hours, tens of minutes, and units of 105 minutes, respectively, each of which consists .of A" a solenoid 53 whose,plunger 54 is designed to. strike a tuned' bar of steel 55. Above each tuned bar is a carefully designed resonance chamber 56 which acts upon a standard telephone transno mitteri?. When the steel barsarc struck by their respective plungers the bar of steel of the hours gong C1 is tuned to emit a deep, mellow pitched tone, the bar of the tens of minutes gong C2 is tuned to emit a medium pitched tone, and the bar of the units of minutes gong C3 is tuned to emit a high pitched tone. The buzzer B1 transmits a special tone signal when a 0 or zero is to be transmitted.

The start relay 102 shown in Fig. 2 controls` the starting of the relays and equipment for4 transmitting the time signals, which are con-l tinuously transmitted as long as the start relay is energized. It should be noted, however, that the registering equipment comprising the hours, tens, and units registers HR, TR, andUR (shown in Fig. 3) are continuously operated by relay 230 from ground impulses from a master clock (not shown on the drawings). The start relay 102 is operated'over conductor 43 upon the seizure of. any holding-bridge circuit, similar to holdingbridge circuit HB, by a subscriber desiring to know the time of day. Relays 10B- 104, 105 106, and 107-108 are relay interrupters and each group is adjusted to operate at a different speed. Interrupter relays 103-104 are adjusted to interrupt the circuit through contacts 122' about forty times per minute, relays 105-106 are adjusted to interrupt the circuit through contacts 126 about eighty times per minute, and relays 107-108 are adjusted to interrupt the circuit through contacts 130 about one-hundred and twenty times per minute.

Relays l10- 111 are sequence relays and are controlled by the sequence switch SS. The sequence switch SS is of the type which advances its wiper 133 one step upon each energization of the rotary magnet 116 and restores its wiper to its original starting position when the release magnet 11'7 is energized. The sequence switch SS and the sequence relays 110 111 are arranged to prepare operating circuits over the various registers HR, TR, and UR shown in Fig. 3, in the proper sequence and are also arranged to prepare the circuit for the various gongs C1 to C3, inclusive, in sequence with the circuits of the various registers. With the sequence switch SS in its first position the forty per minute interrupter, the low pitched or hour gong C1, the counting relays 201- 226, and the bank of the hours register HR are in association. In its second position the .eighty per minute interrupter, the medium pitched or tens of minutes gong C2, the counting relays 201-226, and the bankcf ythe tens of minutes register TR are in association. In its third position the4 onehundred and twenty per minute interrupter, the high pitched or units of minutes gong C3, the counting relays 201- 226, and the bank of the units of minutes register UR are in association. In the fourth position the release of the apparatus takes place and the sequence of operation is repeated. i The stop relay 113 is arranged to open the circuit for the counting relays 201-226, inclusive, 'Shown in Fig. 3, when the number of chime signals transmitted to the subscriber from any one of the gongs corresponds with'the setting of'the associated register. Each time the stop relay-is energized the sequence switch SS advances its wiper 133 one step. Relays v114 and 115 are delay relays and are arranged to control the length of the pause between the transmission of chimes from one of the gongs to the other. Relay 114 is a 'relay with a weighted spring combination, similar to that disclosed in Patent No. 1,641,-.

ling the weight attached to spring 151. Following the energization of the stop relay 113 after each signal is transmitted, relay 114 is energized and causes the weighted spring to vibrate. The vibrating contact does not close a circuit to relay A115 until it comes to rest, and in this way provides the necessary delay between the transmission of chimes from each of the diiTerent gongs.

Fig. 3 shows three registers, the hours register HR, tens of minutes register TR, and the units of minutes register UR. The registers are of the eleven-point rotary switch type and are similar in construction to the twenty-five-point rotary switch disclosed in Patent No. 1,693,027, granted to John Erickson, November 27, 1928. The rotary switches are of the step-by-step type in which the wipers move in a forward direction only, and in which the wipers are advanced when the stepping magnet retracts its armature "rather than when the stepping magnet attracts its armature. 'I'he units of minutes register UR advances its Wipers one step each minute, the tens o'f minutes register TR advances its wipers one step for every ten steps of the wipers of the units of minutes register UR, and the hours register HR advances its wipers one step for every six steps of the wipers of the tens of minutes register TR. However, due to the fact that only eleven contacts are provided on the standard rotary lineswitch of this type, two relays 22'7.and 2-29 are provided to register eleven and twelve oclock, respectively. In this way the exact time of the day is always registered on the time signaling device.

Relays 203-226 are counting relays wherein the rst relay of a pair is energized by pulse over conductor 157 and the second relay of the pair is energized and locked up in series with the rst when the potential for 4operating the first relay is-removed. Each time the first counting relay of a pair is-A energized a circuit is closed to the connected gong and when the second relay of the pair is energized in series with the rst the circuit to the connected gong is opened and a testing c ircuit is closed for the stop relay 113. When the stop relay is energized over any one of these test circuits it will open the holding circuit for all of the energized counting relays.

Relays 201 and 202 are a pair of pick-up relays similar to the regular counting relays: Relay 201 closes a circuit for stepping the wiper of the lsequence switch SS off-normal each time a new complete time signal is to be transmitted. Relay 200 controls a circuit for operating the tuned buzzer Bi when the tens and units of minutes registers TR and UR have advanced their wipers to their respective sixth or tenth bank contact. When the time registered is 1: 00,1: 10,

1: 20 oclock, etc., 2: 00, 2: 10, 2: 20 oclock, etc.,`

it should be understood that no chimes are transmitted to represent the zero of the time registered ,but that the buzzer Bl is operated to transmit a tone signal, the length of which can be varied at the terminal block TB.

In the upper right-hand corner of Fig. 3 is responsible forvthe supervision of the ,equipment.

In the drawings the slow-acting relays are denoted by shading the lower portion of their cores, or by making the upper portion of their cores solid black, depending upon whether the relay is merely slow-to-release or is also slow-tooperate. A shaded portion on the lower end of the core indicates that the relay is slow-to-release after its energizing circuit yis opened, but is not appreciably slow-to-operate when its energizing circuit is closed. A solid black portion on the upper end of the core indicates that the relay is slightly slow-to-operate when an energizing 'circuit is closed in addition to being slow-to-,re-

lease after its energizing circuit is opened.

The invention having been described in general, a detailed description of the operation of the apparatus shown will follow.

the dialling of the number assigned to the timeA signaling device, the wipers of the selector are stepped vup to the proper level and are automatically rotated across the banks associating its wipers with bank contacts 111, 12, and 13, assuming that the trunk connected to these contacts is idle. When the selector S associates its wipers with contacts 1l. 12, and 13 of its bank, a'circuit is immediately closed from ground, lower winding of relay 17 of the holding-bridge circuit HB,

conductor 16, bank contact 13, and lower line wiper of the selector, subscribers loop, upper line wiper and bank contact 11 of the selector, conductor 14 ofthe holding-bridge circuit HB, upper winding of relay 17, to battery. Line relay 17 closes an obvious circuit for the release relay 18. At armature 26 and its front contact, release relay 18 grounds the release trunk conductor 15 tohold the selector and preceding switches operated. At armature 24 and its front contact,

release relay18 closes a circuit for the switchthrough relay 22 from ground, armature 143 and its resting contact (Fig. 2) armature 134 and its resting contact, conductor 42, armature 24-and its front contact, lower winding of switch-through relay 22, armature 32 and its resting contact, re

sistance 31, to battery. Upon energizing, switchthrough relay 22 closes a locking circuit for itself over its upper winding at armature 36 and its front contact to vthe grounded release conductor 15. connects the secondary winding of transformer 39 tp line conductors 14 and 16 at armaturesJ 35 and 38 and their respective front lcon-v tacts, and by the same action disconnects the artificial line or short-circuit around 'the secondary winding of transformer 39 at the-normally closedv contacts controlled by armatures 35 and 38 and their respective front contacts. At armature 37 and its frontcontact, switch-through relay 22 prepares a circuit I or subsequently .dis'

connecting the subscriber from the time signaling conductors 40 and `41 and transformer 39 and connecting him to the busy-tone conductor as will be hereinafter described.

I'he holding-bridge circuit HIB is now in position to permit the time signals, transmitted over conductors 40 and 41 and transformer 39, to be received by the subscriber.`

,Transmission of time signal It has beenmentioned before that the equipment is in the position shown on the drawings when it is seized by the subscriber. The position of the registers shown in Fig. 3 should be particularly noticed.` The wipers 236-237 of the hours register HR are resting on the iirst set of contacts of its bank, the wipers 238-240 of the tens of minutes register TR are resting on the sixth set .of contacts of its bank, and Wipers 2 41-243 of the units of minutes register UR are resting `on the iii-st set of contacts of its' bank. It can be seen, by the position of the wipers, that the time to be transmitted by the time signaling device'is 1:41 oclock.

By referring-again to the energization of the release relay 18 of the holding-bridge circuit HB, shown in Fig. 1, it will be noted that a circuit is closed from ground, armature 25 and its front contact, armature 30 and its resting contact, conductor 43, armature 118 and its. resting contact,

Winding ofA start relay 102 to battery. Upon A energizing, start relay 102 locks itself to grounded conductor 43 at armature 119 and its front contact, and grounds conductor'58 at armature 120 and its front contact to start the operation ot the interruptor relays 10S- 108, inclusive. The

grounding of conductor 58 also completes a series circuit for the transmitters of the gongs Cif, C2, and C3 from grounded conductor 58, variable resistance 51, one winding of the `impedance coil 48, transmitters "of the C3, C2, and C1 gongs in series, the other winding of the impedance coil 48, to battery. The variable resistance5l and resistance 47 are provided to vary the volume of the signal or chime transmitted by the gongs.

The resistance 63 shunted around the transmitter of the high-pitched gong C3 i s provided to further cut down the intensityof the signal transmitted by the high-pitched gong, whichv is sometimes unpleasantly loud. i

Returning now to the operation of the interrupter relays 103-108, inclusive, it will be seen.

that upon grounding conductor 58 that a circuit is closed through armature and its resting contact, winding of the interruptor relay 106, to battery. Upon energizing, relay 106 closes a circuit for relay 105' at armature 128 and its front contact. Relay 105 upon energizing, opens the initial energizing circuit for relay 106 at armature 125'ahd its resting contact. Relay 106 restores to normal andat the same time opens the circuit rof relay 105. Relay 105 restores to normal and c at armature 125 and its resting contact completes the circuit again for relay 106. This inter-action of the two relays continues until ground is removed from conductor 58. The inter-action of4 the interruptor relays 107 and 108 isexactly the/ I same as described in connection with interruptor relays 105 and 106. It'should be understood,'how ever, that relays 105 and. 106 are adjusted so that the circuit thorugh armature 126 and its resting contact isinterrupted approximately eighty times per minute, while relays 107 Vand y108 are adjusted to interrupt the circuitb at armature 130 and its resting contact about one-hundred and twenty times per minute. V

TheJ first time interruptor relay 106 is ener- I gized a circuit is closed from grounded conductor 58, armature 127 and its front contact, armature 124 and its resting contact, winding of interrupter relay 103, to battery. Relay 103 energizes and at armature 123 and its front contact, prepares a` upper winding of interr'upter relay 104, arma ture 123 and its front contact, winding of 103 to battery. The front contact and the normally closed contact controlled by armature 127 are so adjusted that when relay 106 falls backu the front contact is opened and the normally closed contact which has been opened by the operation of the armature 4127 is closed approximately at the same time. when relay 106 falls back the rst time. Relay 104, upon energizing, prepares a locking circuit for itself at armature 124 and its front contact, and by the same action opens a point in the circuit for relay 103 at its resting contact. The sec ond time interrupter relay 106 is energized a locking circuit is closed for relay 104 from the grounding conductor 58, armature 127 and its front .contact, armature 124 and its front contact, lower Winding of. relay 104, to battery. Relay 103 now4 falls back because the locking circuit in series with the upper winding of relay 104 has now been opened at the normally closed contact controlled by armature 127. The second time relay 106 falls back it opens the locking circuit for the lower winding of relay 104 at'armature 127 and its front contact, Relays 103 and 104 are now in their normal position and upon the next energization of interrupter relay 106 the sequence of operation is again repeated. It can readily be s'een that relay 103 interrupts the vcircuit through armature 122 and its resting contact just exactly half as many times as relay 106 interrupts the circuit through armature 126 and its resting contact, therefore, armature 122 and its resting contact is interrupted approximately forty times per minute.

By referring again to the operation of the start relay 102, it will be noted that it closes a circuit at armature 121 and its front contact, from ground, armature 149 and its, resting contact,

armature 146 and its resting contact, armature 121 and its front contact, winding of relay 10.1., to battery. Relay 101 operates and.opens the initial energizing circuitfor the start relay 102 at-armature 118 and its resting contact. The operating ground for relay 101 is also extended to conductor 159 and to armatures 122, 126, and

130 ofthe interrupter relays.

With interrupter relay 103 in its normal position grounded armature 122 completes a circuit over -its resting contact, terminals 1 and 2 of the striking speed terminal block, armature 138 and,

its resting contact, armature 141 and itsresting contact.,` conductor 157, armature 250 and its' resting contact, winding of pick-up relay 201, to battery. Upon.V energizing, relay 201 closes a circuit from ground,l armature 276 and its front contact, conductor 158, armature 135 and its resting contact, winding of rotary magnet 116 of the sequence switch SS, to battery. Upon energizing, I

rotary magnet 116 advances its wiper .133 one step, to the rst contact of its associated bank.- When the wiper 133 lof the sequence switch kSS is advanced to the first bank contact relay 109 is Therefore, relay 103 does not deenergize energized from ground, contacts `132 of off-normal springs ON, winding of relay 109, to battery. Upon energizing, relay 109 prepares a circuit for the release magnet 117 of the sequence switch SS at armature 135 and its front contact, opens the circuit over conductor 158 to the rotary magnet 116 at armature 136 and its resting contact, opens the cut-in circuit over conductor 42 at armature 134 and its resting contact, and at armature'134 and its front contact prepares a locking circuit over conductor 153 for relay 230.

Referring again to pick-up relay 201, it will be notedthat at armature 302 and its front contact it prepares a locking circuit for itself in seriesH with relay 202. quently energizes, as has been hereinbefore described, and at armature 122 and its resting contactIopens the initial energizing circuit for pickup relay 201. However, pick-up relay 201l locks up in series,with relay 202, as soon as its original energizing circuit is opened, from battery winding of relay 202, to grounded conductor 159. Upon energizing, relay 202 prepares a circuit for counting relay 203 at armature 250 and its front contact.

Interrupter relay 103 subsequently deenergizes again and closes a circuit from grounded conductor 159, armature 122 and its resting contact, contacts 1 and 2 of the striking speed terminal block, armature 138 and its resting contact, armature 141 and its resting contact, conductor 157. armature 250 and its front contact, armature 251 and its resting Contact, winding of counting relay 203, to battery. Upon energizing, counting relay 203 prepares a circuit for itself in series with relay 204 at armature 303 and its `front contact, and at armature 257 and its front Contact closes a circuit from grounded conductor 159, armature 332 and its resting contact, armature 278 and its front contact, armature 257 and its resting contact, conductor 160, armature 142 and its resting contact, armature 139 and its resting contact, terminal G multipled with terminals E and F and connected to terminal A of terminal block TBI, `conductor 62, winding of solenoid 53 of the `hours gong C1, to battery. The operation of the solenoid 53 causes the plunger 54 to strike the tuned bar of steel 56. The transmitter 57 fastened to the resonance chamber 56, picks up the chime emitted by the tuned bar 55, when it is sharply struck-by the plunger 54, and transmits it over conductors 40 and 40, primary and secondary windings of the transformer 39, to the subscriber at substation T.

Interrupter relay 103 is subsequently energized again and opens the initial energizing circuit Interrupter relay 103 subse-A over conductor 157 for counting relay 203 at energizing, counting relay 204 opens the circuit over conductor 160 to the hours gongCl at armature 279 and its resting contact, it prepares a circuit forcounting relay 205 at armature 2.51 and its front contact, and at 4armature 264 and its front contact closes a circuit over test conductor 316 for stop relay 113. The circuit for` the stop relay 113 is completed at this time from ground, armature and its resting contact, armature 137 and its resting contact, conductor 154, wiper 237 of the hours register HR and its associated first bankcontact, test conductor 316, armature 264 and its front contact, conductor 161, winding ,relay 204, to grounded conductor 159. Upon 55. the hours gong C1 and the apparatus is now in aca-gior of stop relay 113-, to battery. Upon energizing, stop relay 113 closes an obvious locking circuit for itself at armature 147, closes a circuit for relay 114 at amature 148 and its front contact, and at armature 149 and its resting contact removes the holding ground. from conductor 159 and the armature springs 122, 126, and 130 of the interrupter relays. Dueto the removal of holding ground from conductor 159, relays 201-, 204 oi' the counting chain immediately restores to normal and due to the removal of ground from the armatures 122, 126, and 130 of the interrupter relays the relays of the counting chain cannot be operated again over conductor 157 until the ground is again restored to these armatures.

By referring again to the operation of stop relay 113, it will be noted that at armature 149 and its front contact it closes a circuit from ground, armature 149 andits front contact, armaturev 145 and its resting contact, winding of rotary magnet 116, to battery. Upon energizing, rotary magnet 116 advances its wiper 133 to the second contact of its associated bank and `closes an obvious circuit for sequence relay 110. Upon energizing, sequence relay removes the ground, over armature 140 and its resting contact, from conductor 154 and the wiper 237 of the hours register I-IR and connects it to conductorr 155 and the wiper 240 oi'the tens of minutes registers TR at armature 137 and its iront contact, disconnects the interrupter circuit over armature 122 at armature v138 and its resting contact4 and connects the interrupter circuit over armature 126 at amature 136 and its front contact, and disconnects the circuit for the hours gong C1 at armatures 139, 166 and 168 and their respective resting contacts and prepares the circuit for the tens of minutes gong C2 at armatures 139, 166, and 168 and their respective front contact-e.

By referring again to the delay relay 114, which is energized following the energization of the stop relay 113, it Will be noted that when it pulls its armature 150in contact with the Weighted spring 151 the weighted spring 151 vibrates and when it cornes to rest closes an obvious circuit forthe slow-'acting relay 115 which subsequently energizes. Upon energizing, rel-ay opens the locking circuit for the stop relay 113 which irnme diately falls back. Upon falling back, stop relay 113 opens the obvious circuit for relay 114 and it in turn opens the circuit tor slow-acting relay 115.

The subscriber has now heard one chime from position to transmit the chimes from the tens of minutes gong C2.- K

When the. stop relay 113 deenergizes it replaces the holding ground on conductor 159 and the interrupter armatures 122, 123,y and 130 of If the interrupter relay( the interrupter relays. .106 is deenergized when ground is replaced on conductor 159 a circuit .is immediately closed. to thepick-up relay 201 from grounded conductor 159, armature 126 and its resting contact, contacts 3 and 4 of the striking speed' terminal y block, armature 138 and its iront contact, arma-u ture 141 and its resting contactfconductor 157, armature 250 and its resting contact, winding of the pick-up relay 201, to battery. Upon enerlthe initial energizing circuit -for `pick-up relay Interrupter relay 106 is subsequently energized circuit is opened at armature 136 by the operation of the relay 10S-which was energized when the sequence switch SS stepped its wiper 133 offnormal.-

as has been hereinbefore described, and opens 201 at armature 126 and its resting contact. However, pick-up relay 201 is immediately en ergized in series with relay 202, from battery, winding of pick-up relay 201, armature 302 and its front contact, winding of relay 202, to grounded conductor 159. Upon energizing relay 202 prepares a circuit for counting relay 203 at armature 250 and its front. contact.

Interrupter relay 106 subsequently deenergizes again and at armature 126 and its resting contact, closes a circuit for counting relay 203 over conductor 157, armature 250 and its front contact, armature 251 and its resting contact, winding of counting relay 203, to battery. Counting relay 203 upon energizing prepares a circuit for counting relay 204 at armature 303 and its front contact, and at armature 278 and its front contact closes a circuit from grounded conductor 159, *100 armature 332 and its resting contact, armature 278 and its front contact, armature 279 and its resting contact, conductor 160,. armature 142 and its resting contact, armature 139 and its front contact, terminal J multipled with terminals H and I and connected to teal B of terminal block TBL conductor 61, winding of the solenoid of the tens of minutes gong C2, to battery.4 The energization of the solenoid of the tens of minutes gong C2 causes its plunger to strike the tuned bar of 11.0 steel and the chime emitted therefrom is pickedup by the associated transmitter and resonance chamber, and transmitted over conductors 40-4-41 and the transformer 39 to the subscriber at subu station 'l'.

interrupter relay 106 subsequently energizes again and opens the initial energizing circuit for counting relay 203 at armature 126 and its resting contact. However, counting relay 203 ie- '120 diately energizes in series with counting relay 20d from battery, winding oi' countingrelay 203, armature 303 and its front contact, Winding of counting relay 204i, to grounded conductor 159. Upon energizing, counting relay 2011 opens the cir- 125 cuit over conductor 160 to the tens of minutes gong C2 at armature 279 and its resting contact, prepares the energizing circuit for counting relay 205 at ture 251 and its front contact. and at armature 264 and its front contact closes a testing circuit for stop relay 113, from test conductor 316, armature 264 and its front contact, conductor 161, winding of stop relay 113, to battery. Due to the tact that the test conductor 316 has not been grounded by any of the wipers of the registers, stop relay 113 is not energized.-

Interrupter relay 106 subsequently deenergizes again, and at armature 126 and its resting contact closes a circuit over conductor 157, armature 250 and itsfront contact, armature 251 and'140 its iront contact, armature 252 and its resting f contact, winding or counting relay 205, to battery. Upon energizing, counting relay 205 prepares a locking circuit tor itself in series with counting*` relay 208 at amature 304 and its front contact, and'at amature v280 and its front contact closes a circuit` from grounded conductor 159, armature 332 land its resting contact, armature 280 and am its ,front contact, amature 281 and its resting contact, conductor 163, armature 165 and its rest- 150 in'g contact, amature 166 and its front contact,

irs

terminal I multipled with terminal H and J and connected to terminal B of the terminal block TBI, conductor 61,- winding of the solenoid of the 'tens of minutes gong C2, to battery. The second chime from the tens of minutes gong C2 is then transmittedvas before to the subscriber at substation T.

Interrupter relay 106 is subsequently energized again and the initial energizing circuit for countl ing relay 205 is opened at armature 126` and its resting contact. However, counting relay 205 im mediately locks up in series with counting relay 206 from battery, winding of counting relay 205,

armature 304 and its front contact, winding of counting relay 206, to grounded conductor 159. Upon energizing, counting relay 206 prepares a circuit for counting relay 207 at amature 252 and its front contact, opens the circuit over conductor 163 to the tens of minutes gong C2 at armature 281 and its resting contact, and at armature 265 and its front contact closes a circuit from test conductor 317, armature 265 and its front conl tact, conductor 161, winding of stop relay 113, to battery. Stop relay 113, however, is not energized over this circuit because the test conductor armature 282 andits front contact it closes a circuit from groundedconductor 159, armature 332 and its resting contact, armature 282 and its front contact, armature 283 and its resting contact, conductor 184, armature 167 and its resting contact, armature 168 and its front contact, terminal H multipled with terminals I and J and connected to terminal B of the terminal block TBl, conductor 61, winding of the solenoid of the tens of minutes gong C2 to battery. The third.

chime from the tens of minutes gong C2 is then transmitted over the previously traced circuit to the subscriber at substation T.

Interrupter relay 106 subsequently energzes again and opens the circuit for counting relay 207 at armature 126 and its resting contact. However, counting relay 207 immediately energizes in series with counting relay 208, from battery, winding of relay 207, armature 305 and its front contact, winding of relay 208, to grounded conductor 159. Upon energizing, counting relay 208 opens the circuit for the tens of minutes gong C2 at armature 283 and its resting contact, prepares a circuit for counting relay 209 at armature 253 and its front contact, and closes a circuit at armature 266 and its front contact, from test conductor 318, armature 266 and its front contact, conductor 161, winding of stop relay 113, to battery. Stop relay 113, however, is not energized at this time because test conductor 318 has not been grounded by any of the wipers of the registers.

Interrupter relay 106 subsequently ldeenerglzes again and closes a circuit at armature 126 and its resting contact, over conductor 157, armatures 250-253 and th'eir respective front contacts, armature 254 and its resting contact, winding of counting relay 209, to battery. Counting relay 209 energizes over this circuit and prepares a circuit for counting relay 210 at armature 306 and its front contact, and at .armature 284 and its front contact closes a circuit from grounded conductor 159, armature 332 and its resting contact, armature 284 and its front contact, armature 285 and its resting contact, conductor 160, over the previously traced circuit to the tens of minutes gong C2. l'The fourth chime from the tens of minutes gong C2 is now transmitted over the previously traced circuit to the subscriber at substation T.

Interrupter relay 106 subsequently energizes again and opens the circuit for counting relay 209 over conductor 157 at armature 126 and its resting contact. However, counting relay 209 immediately energizes in series with counting relay 210 from battery, winding of counting relay 209, armature 306 and its front contact, winding of counting relay 210, to grounded conductor 159.

`Upon energizing, counting relay 210 opens the circuit for the tensof minutes gong C2 at armature 285 and its resting contact, prepares a circuit for counting relay 211 at armature 254 and its front contact, and at armature 267 and its front contact closes a circuit from test conductor 319 to stop relay 113. 113'is energized because the test conductor 319 is grounded by wiper 240 of the tens of minutes register TR..` The circuit for energizing the .stop relay is as follows: battery, winding of stop relay 113, conductor 161, armature 267 and its front contact, test conductor 319, wiper 240 and the associated fourth bank contact -o1 the tens of minutes register TR, conductor 155, armature 137 and its front contact, armature 140 and its resting contact, to ground. Upon energizing, stop relay 113 closes an obvious locking circuit i'or itself at armature 147, closes a circuit for relay 114 at armature 148 and its front contact, and at armature 149 and its resting contact removes the holding'ground from conductor 159 and the armature springs 122, 126, and 130 of the interrupter relays. By removing the holding ground from conductor 159, relays 201--210 of the counting chain immediately restore to normal, and by removing the ground from armatures 122, 126, and 130 of the interrupter relays the relays of the counting chain cannot be operated again over conductor 157 until the ground is again restored to these armaturesprings.

By referring .again to the operation of stop relay 113, it will be noted that at armature 149 vand its front contact it closes a circuit from ground, armature 149 and its front contact, armature 145 and its resting contact, winding of rotary magnet 116; to battery. `Thehro'tary magnet 116, upon energizing, advances its wiper 133 to the third contact of its associated bank, and closes an obvious circuit for sequence relay 111. Upon energizing, sequence relay 111 removes the ground over armature 140 and its resting contact from conductor 155 and wiper 240 of the tens of lminutes register TR and connects it to conductor 156 and the wiper 243 of the unitsrof minutes register UR at armature 140 and its front contact. Sequence relay 111 also connects up This time the stop relay.

armature 130 of the interrupter relay at armaconnects the circuit for the tens of minutes gong Referring again to the delay relay 114 which is energized following the energization of the stop relay 113, it will be noted that. when it pulls its armature 150 in contact with the weighted spring 151 that the weighted spring 151 vibrates and when it cornes to rest closesf an obvious circuit for the slow-acting relay 115 which subsequently energizes. Upon energizing, relay 115 opens the locking circuit for stop relay 113 at amature 152 and its resting contact, and the stop relay 113 immediately falls back. Upon falling back, stop relay 113 opens the obvious circuit for relay 114 and it in turn opens the circuit for the slow-acting relay 115.

The subscriber at substation T has now heard one chime from the hours gong Cl and four chimes from the tens of minutes gong C2. The apparatus is now in the position to transmit the chimes from the units ot minutes gong C3.

When the stop relay 113 deenergizes it replaces the holding ground on conductor 159 and the interrupter armatures 122, 126, and 130 of the interrupter relays. When the interrupter, relay 108 deenergizes a circuit is closed from grounded conductor 159, armature 130 and its resting contact, contacts 5 and 6 vof the striking speed terminal block, armature 141 and its front contact, conductor 157, armature 250 and its resting con# tact, winding of pick-up relay 201 toy battery. Upon energizing, pick-up relay 201 prepares a circuit for relay 202 at armature 302 and its iront contact, and at armature 276 and its front contact connects ground Ito .conductor 158, The grounding oi' conductor 158 has no effect at this time because the circuit over this conductor` is open at armature 136 and its resting contact.

Interrupter relay 108 is subsequently energized as has been hereinbefore described, and opens thel Iductor 157, armature 250 and its iront contact,

armature 251 and its resting contact, winding ci counting relay 203 to battery. Upon energizing,

counting relay 203 prepares a circuit for counting relay 204 at armature 303 and its front contact, and armature 278 and its iront contact closes a circuit from grounded conductor 159, armature 332 and its resting contact, armature 273 and its iront contact, armature 279 and its resting contact, conductor 160, armature 142 and its iront'A contact, terminal M multipled to terminals L and K and connected to terminal C of the terminal block TBl, conductor 60, winding oi the solenoid of the units of minutes gong C3, to battery. The energization of the solenoid ot the unit oi minutes gong C3 causes its plunger to strike the tuned bar of steel and the chime emitted therefrom is picked up by the associated tritter and res.

onance chamber, and transmitted over previously traced circuit to the subscriber at substa, =tion T.

Interrupter relay 108 subsequently energizes andopens the initial energizing circuit over conductor 157 for counting relay 203 at armature' 130 an'd its resting contact. Counting relay 303 is immediately energized in series with counting relay 204 from battery, winding of counting relay 203, armature 303'and its front contact, winding of counting rela 204,.to grounded conductor 159. Upon'l energizing, counting relay i204 opens the circuit over conductor 160 to the units of minutes gong C3 at armature 27-9 and its resting contact, prepares a circuit for counting relay 205` at armature 251 and its front contact, closes a circuit over test conductor 316 to stop relay 113 at armature 264 and its front contact. The circuit for the stop relay 113 is completed at this time from ground, armature 140 and its front contact, conductor 156, Wiper 243 and the first bank contact of the units of minutes register UR, test conductor 316, armature 264 and its front contact, conductor 161, winding of `stop relay 113, to battery. Upon energizing, stop relay 113- closes an obvious locking circuit for itself at armature 147, closes a circuit for relay Y11i lat armatureli and its front contact, and at from conductor 159, relays 201--204 of the counting chain immediately restore to normal and by removing the ground from armatures 122, 126, and 130 of the interrupter relays, the relays of the counting chain cannot e operated again over conductor157 until the ground, is again restored to these armatures.

By referring again vto the operation of stop relay 113, it will be noted that armature 149 and its front contact closes a circuit from ground, armature 149 and its front contact, armature 165 and its resting contact, Winding of rotary magnet 116, to battery. Upon energizing, rotary magnet 116 advances its Wiper 133 to the fourth bank contact of its associated bank, and closes an obvious circuit for sequence1 relay 112. Upon' energizing, relay -112 closes an obvious locking circuit for itself from ground at armature 1-19 and its front contact, opens the circuit for the rotary magnet 116 at armature 145 and its resting contact,'and at armatme 1.45 and its front contact closes an obvious circuit for release magnet 117 of the sequence switch SS. Due to the operation of the release magnet 117 the Wipers 133 o the sequence switch SS immediately restore tonormal and opens the oir-normal contacts 132. Due to the opening of contacts 132 the circuit oi relay 109 is opened and it subsequently restores to its normal position.

By referring again to the delay relay 114, which isenergized following the energization of the stop relay 113, it will be noted that when it pulls its. armature 150 in contact with "the weighted springy 151 that the Weighted spring 151 vibrates and when" it comes to rest closes an obvious circuit for the slow-acting relay 115, which subsequently energizes. Upon energizing, relay;1i5 opens the locking circuit for the stop relay 113 which immediately falls back. Upon falling back stop relay 11'3 opens the obvious circuit of relay 114 and it in turn opens the circuit for slow-acting relay 115.

By referring again to the stop relay 113 it will be noted that when this falls back the locking circuit for relay 112 is opened at armature 149 and its front contact. However, relay 112 is slow-to-release and does not fall back for a short time. At armature 149 and its resting back and opens the initial energizing circuit for relay 19 at armature 146 and its front contact.

As soon as its initial energizing circuit is opened relay 19 locks up in series with relay 20 from battery, winding of relay 19, armature 27 and its front contact, winding of relay 20, armature 26 and its front contact, to ground. Upon energizing, relay 20 prepares a circuit for the kick-off relay 21 at armature 28 and its front contact.

The subscriber at substation T has now heard one chime from the hours gong C1, four chimes from the tens of minutes gong C2, and one chime frointhe units of minutes gong C3, indicating that .the time is 1:41 oelock. The time signaling deviceis now in' position to transmit the same time signal to the subscriber again, and the holding-bridge circuit HB is in position to disconnect the subscriber from the time signaling device and connect him to the busy-tone conductor after he has received the time signal again.

It should be noted that the Vpick-up circuit overconductor 42 is closed at this time and will connect any subscriber that has. seized a holding-bridge circuit similar to holding-bridge circuit HB to the time signaling conductors 40 and 41 over the transformer associated with his holding-bridge circuit. A holding-bridge circuit cannot be connected to the time signaling conductors after the transmission of a time signal has started, because the pick-up circuit over conductor 42 will be opened at armature 134 and its resting contact.

The operation of the time signaling device when transmitting the second time signal to the subscriber connected to holding-bridge circuit HB is the same as has been hereinbefore described. However, after the last signal has been transmitted; the stop relay 113 falls back and opens the circuit for the slow-to-release relay 112. With the stop relay deenergized and the slow-to-release relay still in its operated position a circuit is closed 4 `frorn ground, armature 149 and its resting contact, armature 146 and itsfront contact, conductor 44, armature 37 and its. front contact, armature 28 and its front contact, lower winding of kick-off relay 21, to battery. Upon energizing, kick-off relay 21 locks itself overits upper Winding from battery, upper winding of kick:

01T -relay 21,-armature 33 and its frontv contact, armature 26 and its front contact, to ground.

At armatures 29 and 34 and their respective restdevice. At armature 34 andits front contact,

relay 21 connects the subscriber to the busy-tone transformer 52. I

Ordinarily the subscriber will hang up his receiver after he has heard the complete time signal the rst time. If he is uncertain as t'o what time was transmitted he may listen to the next complete time signal. However, it is undesirable to permit the subscriber to listen to the time signal indenitcly, and'thereore, the equipment is arranged to connect him to the busy signaling"l conductor after he has heard the second complete time signal. In this way the trunksl of the signaling device are not tied up any longer than necessary.

Upon hearing the busy-tone the subscriber will hang up his receiver and in so doing opens the loop circuit for the line relay 17 of the holdingbridge circuit HB. Upon deenergizing, line relay 17 opens an obvious circuit to release relay 18. Relay 18 subsequently deenergizes and at arma 'ture 26 and its front contact removes the holding ground'from conductor 15 and the preceding switches restore to normal in the usual manner.

of the holding-bridge circuit HB, constitute av tuned circuit which permits the sound of the gongs to be received by the subscriber perfectly, but effectively prevents two or more subscribers from talking to each other while listening to the time signaling device.

Automatic subscriber seizing a holding-bridge circuit after the time signaling device has started transmitting a time signal to another connected subscriber It will be assumed that they time signaling device has started transmitting the time signal over conductors 4f) and 41 to a subscriber connected to a holding-'bridge circuit, similar to holding bridge HB, an-d that a second subscriber seizes the holding-bridge circuit HB after the rst two digits of the signal have been transmitted by the hours and tens of minutes gong C1 and C2, respectively.

Line relay 17 of the holding-bridge circuit HB energizes over the subscribers loop circuit as before. Line relay 17 closes an obvious circuit for the release relay 18. At armature 26 and its front contact, release relay 18 grounds the release trunk conductor 15 to holdthe selector and preceding switches operated. At armature 24 and its front contact, relay 18 prepares a pick-up l circuit for relay 22. The circuit for pick-up relay 22 over conductor 42 has been opened by relay 109 at armature 134 and its resting con.- tact. erates as soon asthe sequence switch SS advances its wiper133 from its normal position. Therefore, the second subscriber desiring to be connected to the time signaling device must Wait It vill be remembered that relay 109 op until the time signal being transmitted to the rst subscriber has been completed and relays 109, and 112 arerestored to tleir'normal positions. At armature 25 and its front contact, release relay .18 ground the 'start conductor 43to maintain' the4 startl relay 102 of the time signaling device in an ,operated position after the first subscriber disconnects. r

With the pick-uprelay 22 in its normal position, the subscriber `connected to the holdingbridge circuit HB will receive a tick-teck tone signal similar to the ticking of a grandfather clock. The circuit for the tick-tock tone is completed by the operationof the `interrupter relays 103 and 104. With the interrupter relay 104 in its normal position, a circuit can be traced from battery, lower winding of relay 104, conductor 59, one winding of transformer 49, condenser and ground. However, relay 104 does not -operate over this circuit. When relay 104 is energized as described hereinbefore and locked to ground lat conductor 58, the circuit over conductor 59 to transformer 49 is short-circuited. This breaking and making of the circuit through the winding yof transformer 49 causes a tone signal, similar to the ticking of a clock, to be transmitted over consubscriber that a connection has been established for the time signaling device. vAfter the time signal, being transmitted by the signaling device to the first subscriber, is completed, relays 109 and 112 of the time signaling 'device Willf'restore to normal and close a circuit tothe pick-up relay 22 of the holding-bridge circuit HIB, from ground, armature 143 and its resting contact, armature 134 and -its resting contact, conductor 42, armature 24 and its front contact, lower winding or" switch-through relay 22, armature 32 and its resting contact, resistance 31, to battery. Switch-through relay 22 locks up over its upper winding as before, andat armatures 35 and'38l and their respective resting contacts opens a circuit to the tick-took tone conductors and 46 and connects the subscriber to the time signaling conductors over the transformer 39 at arma-v tures 35 and 38 and their respective front contacts. The transmission of the time signals and the connecting of the busy-tone to the subscribers line after he has heard the completetime signal transmitted twice is exactly the same as has been described hereinbefore.

Transmission of 'special signal when the wipers of the tens of Minutes register TR are cssociatezil with the sixth bank contact and the wipers oy' the units of-miauies register UR are associated with the tenth bank contact lt will be assumed that the wipers of the tens ci minutes register TR are associated with the sixth bank contact, that Athe wipers 'of the units of minutes register UR are associated with the tenth bank contact, and that the signaling device has transmitted the time registered` on the hours `register HR, as has been hereinbefore described."

After the time registered on the hours` register HR has been transmitted by the hours gong C1, the stop relay 113 is energized, as has been pointed out. Upon energizing, the stop relay 113 removes the holding ground from conductor 159 to allow the counting relays to fall back and also to re vmove the ground from armatures 122, 126, and

130, so that the operation of the interrupter relays 101,-108 has no effect at this time. At armature 149 and its front contact, stop. relay 113 closes a circuit for rotary magnet 116 of `the sequenceswitch SS. Whereupon Wiper`133 is advanced Vto its associated second bank contact 7 and closes an obvious circuit for sequence relay 110. At the resting contacts of armature 13'7, relay 110 removes the ground from conductor 154,

and at the front contact of armature 13'? a circuit is closed from ground, armature 140 and its resting` contact, armature 137 and its front contact, conductor 155, wiper 240 of the tens of minutes register TR andlits associated sixth bank confront contact, relay 200 grounds conductor 331 and test conductor 318 by way of the terminal tact, conductor 315, winding of relay 200, to battery. Relay 200 energizes over this circuit. Relay 110 also opens the circuit to the hours gong Cl at armatures 139, 166, and 168,. and their respectiveresting contactsand at the front con-` tacts of these armatures a circuit is prepared for the tens of minutes gong C2. By referring again to the operation of relay 200, it will be noted that at armature 332 and its resting contact afcircuit is opened'so that the operationfof the counting relays inclosing the front contacts of armatures 278, 280, 282, and 284 to operate 'the gongs is not effective as long as relay 200 is operated. At armature 263 and its block TB. It will be noted that by changing the connection 'on the terminal block TB it is a very simple matter to connect conductor 331 to any one of the test conductors 310, 317, 318, and 319. The lengthlofA the tone signal transmitted by buzzer B1 depends on the particular test conductor grounded by armature 263 of relay 200.

The stop relay 113 subsequently deenergizes, as has been hereinbefore described, and replaces the holding ground on conductor 159 and the in terrupter/'armatures 122, 126, and 130 of the interrupter relay.l It is believed that the operation o the pick-up relays 201--292 and the counting relays 203-226 is quite clear, and it is not thought necessary to describe the detail operation again. Following the energization of the pick-up relays 291-4202, countmg relay 203 is subsequently energized, and at armature 277 and its iront contact a circuit is closed from ground, armature 330 and its front contact, armature 2'77 and its front contact, conductor 169, terminal N connected to terminal D of the terminal bloei: Th1, winding of burner B1, resistance 170, to battery.` The vibration of ,the buzzer causes a tone signal to be transmitted over conductors 66 and 9'?, conductors 40 and 41, transformer 39, to the subscriber. The `counting relays are succesolvely test conductors 310 to 319 for a marking ground .to operate the stop relay 113. However, if no ground is encountered on these conductors ico the stop relay is not energized". When counting relay 203 is energized, however, a circuit is closed iomground, armature 263 and its front contact, conductor 331, connected to test conductor 318 by way oi the terminal block TB, armautre. 266 and its front contact, conductor 161, winding of stop relay 113, to battery. At armature 149 and its resting contact. stop` relay 113 removes the holding ground from conductor-159 and armatures 122, 126, and '130 of the interrupter relays. By remoying the holding ground fromponductor 159 all the counting relays in thechain fall back as before. At armature 277 and its front contact, counting relay203 opens the vcircuit for the buzzer B1. l f

Referring again to the operation of stop relay 113, it will be-noted that at armature 129 and its front contact it' again closes a circuit for the' rotary magnet 116 ofthe sequence switch SS, advancing its wiper 133 to its associated third bank contact. Sequence relay 1'10 deenergizes as soon as the wiper ls stepped of! the second bank contact and sequencefrelay 111 is energized' as soon as wiper. 1.33 encounters the third bank contact. As soon as sequence relay falls back, it removes the ground from conductor 155, allow.- ing relay 200 to restore to normal. At armature 140 and its front contact, sequence relay 111 contact.

closes a circuit from ground, armature140 and its front contact, conductor 156, Wiper 243, and the associated tenth bank contact of the units of minutes register UR, conductor 315, Winding of relay 200, to battery. Relay 200 energizes as before to prepare the circuit `for the buzzer B1. The operation of the equipment with wiper 243 of the units of minutes register UR resting on its associated tenth bank contact is exactly the- Setting of the registers by the 'master clock The setting of the hours register HR,the tens of minutes register TR,and the units of minutes register UR, by momentary impulses from a master clock will now be described.- Conductor 328 shown l in theupper left-hand corner of Fig.3is connected to a' master clock that is arranged to momentarily close a pair of contacts once every minute. Every time the clock operates its contacts a ground pulse is transmitted over conductor 328,

upper winding of relay 230, to battery. It will be assumed that no subscribers are connected to the time signaling device arid that of the relays, therefore, are in the position shown on the drawings. Relay 230 is only momentarily energized by each ground pulse from the master clock over conductor 328 and is not locked up over its lower winding over conductor 153 because the circuit and subsequently falls back and opens a circuit for magnet 231. Magnet 231 deenergizes and advancesits Wipers 241-243 to the next bank iit is obvious then that each time relay 230 is momentarily operated, magnet 231 of the units of minutes register UR advances its wipers step-byfstep over their associated bank contacts.

When the' 'wipers Ziel-243 of the units of minutes register UR are advanced to the ninth bank contact a circuit Ais closeditrom ground, Awiper 241 and its associated ninth bank contact, winding of the magnet 232 of the tens of minutes register TR, to battery. The tens of minutes register magnet 232 energizes, and when' the wiper 241 or the units oiminutes register UR is advanced to the tenth bank contact the circuit to magnet 232 is opened. The deenergization of magnet 232 causes its wipers 233-240 to be advanced one step. Each time the magnet 231 of the units of minutes register UR advances its wipers to the ninth bank contact the circuit is closed to magnet 232 of the tens of minutes register TR, and when the wipers of the units of minutes register UR are advanced to the .tenth bank contact the circuit is opened arid the wipers of the tens of minutes register TR are advanced another step. Each time the wiper 242 of the units of minutes register UR is advanced to its ninth bank contact with the Wiper 239 o1'. the tens of minutes register TRresting on its fifth bank contact a circuit is closed from ground,

l`wiper 242" and its associated-,ninth bank contact,

armature 244 and its resting contact, Winding of v the magnet 233 of the hours register HR, to battery. When the units of minutes register UR steps'its Wipers 01T the ninth bank contact the and the tens of minutes register, respectively, are

associated with their respective ninth and fth bank contacts the circuit is closed tor magnet 233 of the hours register, and each time these `fvvipers are lstepped oii these respective contacts the circuit to the hours register is opened and it advances its Wipers 236--237 one step.

When the magnet 233 of the hours register HR advances its Wipers 236-237 to A the eleventh bank contact a circuit is closed from ground, wiper 236 and its associated eleventh bank contact, winding of relay 227 to battery. Therefore, the next time wipers 242 and 239 are associated with their respective ninth and fifth bank contacts a circuit is closed from ground, Wiper 242 and its ninth bank contact, Wiper 239 and its iifth bank Contact, armature 244 and its front contact, armature 247 and its resting contact, winding ofrelay 228 to battery.

Referring again to the operation of relay 227 when the Wipersof the hours register is associated With its leleventh bank contact. A circuit .is closed from ground, armature 245 and its front contact, armature 249 and its resting contact, to

testeconductor 3,26. Therefore,|when relay 227 is operated and closes a ground circuit at armature 244, the hours register will be marking 11:00 oclock, and when the circuit is closed over Wipers 242 and 239 to relay 228, relay 228 prepares a circuit at armature 246 in series with relay 229, from ground at Wiper 236 and its associated eleventh bank contact. Therefore, when wipers 242 and 239 are stepped to their next bank contact the circuit to relay 228 isA opened, however, relay 228 immediately energizes in series with relay 229 from battery, Winding of relay 228, armature 246 and its front contact, Winding of relay 229 to ground at Wiper 236 and its associated eleventh bank contact. l

When relay 229 is energized it prepares a circuit for operating the magnet 233 of .the hours register the next time a circuit is closed over wipers 242 and 239, and at armature 249 and its' front contact, relay 229 places ground on the test conductor 227, indicating that the time registered is 12:00 oclock. Next time a circuit is closed over wipers 242 and 239 and their associated ninth and fifth bank contacts the magnet 232 of the hours-register is operated over a circuit including armature 243 and its front contact. When the wipers 242 and 239 are advanced to their next bank contacts the magnet 233 of the' hours register is deenergized and advances its Wipers 2364-237 to its rst bank contact. advancing its wiper 238 the magnet 233 opens a circuit to the relays 227, 228, and 229 and they immediately fall back to their normal position.

' It can be plainly seen that each minute the Wipers of the units of minutes register UR are advanced one step, every ten .minutes the wipers of the tens of minutes register TR advance one step, and each hour the Wipers of the hour-register HR advance one step until its wipers are associated with the eleventh bank contact, at which time a'circuit is completed to relay 227 for mark- 'ing 11:00 oclock, which in turn prepares a circuit for relays 228 and 229 to mark 12:00 oclock.

It wm be noted that magnets 231 and 232 are 15 ing circuit isV closed for magnet 232 from ground at wiper 238, and as the seventh, eighth, ninth, tenth, and eleventh bank contacts are all strapped together, -the magnet will be operated in a buzzerlike-manner until the wipers 238, 239, and 240 are again associated with the first bank contact.

The bank of the lamps shown to the right of Fig. 3 are lighted to display the exact time registered on the time signaling device at any time lof the day. It will be noted that the bank contacts 1 to 10, of the units of minutes register UR, associated with wiper 241 are wired to the units of minutes lamps 1 to 9 and 0, respectively. When the wiper 241 advances from one bank contact to the next the lamp connected with the bank contact to which the wiper is associated Will be lighted. The bank contacts 1 to 6 associatedwith wiper 238 of the tens of minutes register TR are Wired to the tens of minutes lamps 1 to 5 and 0. When the wiper 238 advances from one bank contact to the next, the lamp wired to the associated bank lcontact will be lighted, indicating that the time is ten, twentythirty, forty, fty minutes after the hour or exactly on the hour. The bank contacts 1 to 10 associated with Wiper 236 of the hours register HR are wired to the hours lamps 1 to 10, inclusive. As the Wiper 236 is then advanced from one bank contact to the next the lamp associated with that contact is lighted, indicating the exact hour. However, when the wiper 236 is associated with the eleventh bank contact it will be remembered that relay 227 is energized and a circuit is closed from ground, armature 245 and its front contact, armature 249 and its resting contact,'to the lamp indicating 11:00 oclock. It will be remembered that relays 228 and 229 are energized in series when the' time register is 12:00 oclock. A circuit is closed from ground, armature 245 and its front contact, armature 249 and its front contact, to the lamp indicating. 12:00 oclock. The lamp 329 isprovided to indi cate, to the wire chief or other persons responsible for the supervision of the equipment, that the time signaling device has been seized by a subscriber and i's transmitting a time signal. When the sequence switch SS is stepped oilnorrnal a circuit is closed from ground, off-normal contacts 132 of the sequence switch, conductor 162, lamp 329 to battery. Therefore, the lamp 329 will be lighted as soon as the sequence switch is stepped off-normal and will be dark when the sequence switch is vin its normal position. 4

When the wipers 241, 238, and 236 of the register in the position shown on the drawings the hours lamp designated is lighted, the tens of Change in time while the subscriber is receiving a time signal It will be assumed that a subscriber is connected to a time signaling device and that he is receiving the time signals transmitted over conductors 40 and 41 and the transformer 39.

If relay 230 is operated by'ground pulse over conductor 328 from a master clock it will immediately lock up over a circuit from battery, lower winding of relay 230, armature 234 and its front contact, conductor 153, armature 134 and its front contact, armature 143 and its resting contact to ground. As long as relay 109 is energized and relay 112 is deenergized, relay 230 will remain locked up over this circuit. At armature 235 and its front contact, relay 230 holds the magnet 231 in an energized` position. It will be remembered that as long as the magnet is in energized position the wipers associated therewith are not advanced. The relay 230 is held up over this circuit so that the subscriber listening to a time signaling device receives the time that is registered When he is connected to the time signaling device. After the time signal .has been transmitted to the connected subscriber relay 112 energizes, as has been hereinbefore described.

Release of the time signal device when the time signal is only partially transmitted It will be assumed that a subscriber is connected to the time signaling device and has grounded the start conductor 43, and the start relay 102 has' energized and locked itself over armature v119 and its front contact to grounded start conductor 43. Relay 102 also closes a circuit over armature 121 and its front Contact to relay 101. Relay 101 upon energizing, opens the initial energizing circuit for start relay 102 at armature 113 and its resting contact.

It will be assumed that the hours signal has been received by the subscriber and that the tens of minutes register is partially transmitted, therefore, the sequence switch SS will have its wiper 133 positioned to its third bank contact i,

and relay 111 will be energized, together with relay 109 which is energized as soon as the sequence switch steps off-normal.

If the subscriber hangs upl at this time start relay 102 immediately deenergizes and at armature and its resting contact closes a circuit from ground, armature 120 and itsresting contact, armature 135 and its front contact, winding of release magnet `11'1 to battery. At armature 121 and its front contact, start relay 102 opens the circuit to relay 101 and the counting relays over conductor 159. All the counting relays that have been energized and locked up over conductor 159 immediately fall back. Relay 101, however, is a slow-to-release relay and remains energized for a shortl time." If any other subscriber should ground the start conductor 43 at this time, relay 102 cannot operate to start the time signaling device again. The slow-torelease relay 101 is provided to allow sufficient time for the ysequence switch SS to restore to normal after the release magnet 117 is operated, as well as the relays that are operated when the first subscriber hung up his receiver. Relay 101 subsequently deenergizes and the start relay 102 energizes, by the second subscriber, over armature 118 and its resting contact and grounded conductor 43, and locks` up over armaturev 119 and its front contact to grounded conductor 43. Changing the striking speed of the chimes The striking-speed terminal block shown in Fig. 2 is wired so that the counting relays are operated at three different speeds. The operating speed of the counting relays in turn control' the ystriking of the various chimes. When the chime indicating the hour is being operated, the ground impulses for operating the counting relays are transmitted about forty times a minute and it follows that the connected chime will be struck at the corresponding speed. When the tens of minutes are being transmitted the counting relays are operated by ground impulses transmitted about eighty times a minute and the connected chime is struck at a corresponding speed. When the units of minutes are being transmitted the impulses for operating the counting relays are transmitted about one-hundred and twenty times per minute, and the connected chime is struck at the same speed.

It may be desirable in some cases, to have all the chimes striking at the same speed, say about eighty times per minute. It has been pointed out hereinbefore that the operating speed of the counting relays is governed by the interrupter contacts 122, 126, and 130 and that the striking of the chimes is governed by the speed of the operation of the counting relays. In order to have all the chimes striking at the same speed, that is eighty times per minute, whether it is for the hours, tens or units of minutes, the terminals 2, 4, and 6 of the striking speed terminal block shall be strapped together and connected to terminal 3. With the terminal block wired in this manner the interrupter contacts 126, which are operated eighty times per minute,l are the only ones used for operating the counting relays. The interrupter contacts 122 and 130 are connected to terminals 1 and 5 of the striking speed terminal block but are not jumped to any of the contacts 2, 4, or 6 for operating the counting relays.

Of course, it is not necessary to use this particular arrangement inasmuch as the terminal block 'provides facilities for cross-connecting to any of the three striking speeds.

It is recommended, however, that the s cheme shown in the drawings be used, because a subscriber can differentiate between the hours, tens of minutes, and units of minutes chimes, not only by the pitch or tone of the chime but also by the speed at Which it is struck.

Changing the connections of the chimes C1, C2, and C3, at terminal block TBI It will be remembered that when the time signaling device is .transmitting the hours the transfer relays 110 and 111 are in their normal positions and that the ground impulses for operating the chime C1 are transmitted over conductors 160, 163, and 164, and the resting contacts of the three lower armatures of relays 110 and 111. The resting contacts of the three lower armatures of transfer relay 110 are wired to terminals E, F, and G of the terminal block T131 and crossconnected to terminal A to connect up the C1 chime over conductor 62.

When the time signaling device is transmitting the tens of minutes signals the Atransfer relay 110 is energized, completing the circuit, at the front contacts of its three lower armatures toterminals H, I. and J of the terminal block 'ZiBl and cross-connected to terminal B to connect up the C2 chime over conductor 61.

When the units of minutes are transmitted by the time signaling device, the transfer relay 111 is in its energized position and the front contacts of the three lower armatures are connected to terminals K, L, and M of the terminal block TBl, whereby the C3 chime is connected up over conductor 60 by means of the jumper connecting terminal C to terminals K, L, and M.

It is not necessary, however, to have the chimes connected up in this particular manner as will be pointed out hereinafter. The terminal block TBI is provided as a convenient arrangement for cross-connecting any of theehimes C1, C2, and C3 with the contacts of the two transfer relays 110 and 111.

With the present arrangement the C1 or lowpitched chime is used for transmitting the hours signal only; the C2 or medium chime is used to transmit the tens of minutes signal only; and the C3 or high-pitched chime is used to transmit the units of minutes, as has been hereinbefore described. However, it may be desirable in some cases to change the particular arrangement for striking the chimes to facilitate counting the hours asl they are struck. One method that is particularly satisfactory is to use all three chimes C1, C2, and C3 when the time signaling device is transmitting the hours, and using the C2 chime for striking the tens of minutes and the C3 chime for striking the units of minutes as before. To make this alteration it is only necessary to remove the jumpers from terminals A, E, F and G to terminal block TBl and connect three jumpers, one between terminals A and G, the second between terminals B and F, and the third between terminals C and E. The other jumpers on the terminal block remain as is shown in the drawings. With the terminal block TBl cross-connected as described above the chimes C1, C2, and C3 are struck consecutively and repeated again,

depending upon the hour being transmitted. For

example if it is three oclock the first ground pulse operates the low-pitched chime C1, the second pulse operates the medium-pitched chime C2, and the third pulse operates the high-pitched chime C3. .When it is five oclock the three chimes are operated as above pointed out and the fourth pulse operates the low-pitched chime C1 again and the fifth pulse operates the mediumpitched chime C2 again. It can be plainly seen that, if it is three, six, nine or twelve oclock the low, medium and high-pitched chimes are each struck once for three oclock, twice for six oclock, three times for nine oclock and four times for twelve oclock, respectively. With the chimes striking in a musicalv scale low, medium and high-pitched, in consecutive order, the counting of the tone beats as they are transmitted is comparatively a simple matter. The striking of the tens of minutes and the units of minutes chimes C2 and C3 is the same as has been described in connection with the detailed operation -f 1,924,4oa

said impulse sender, and means including said' impulse sender and said counting relays for continuously transmitting the time registered bysaid registers as long as said start relay is operated. o

2. In a time signaling device, continuously operating registering devices for registering the time of day, a transmitting device, a plurality of chimes, means for starting said transmitting device, and means including said transmitting device for controlling said chimes in sequence to transmit the timelregistered.

V3. In a time signaling device, continuously operating registering devices for registering the 'time of day, a transmitting device, a plurality oi chimes, means for starting said transmitting device, and means including said transmitting device for controlling said chimes in sequence tc` transmit signals indicative of the time registered.

4. In a signaling device, a plurality of chimes, a resonance chamber. fastened to each of said chimes, a telephone transmitter mounted on each of said resonance chambers, a circuit includ ing said transmitters, mean for operating any one of said chimes, and means including the 5 transmitter for transmitting the tone emitted therefrom'. over said circuit.

5. In a signaling device, a plurality oi chimes,

a resonance chamber fastened to eaclnoiv said chimes, a transmitter mounted on each `oi" said 'resonance chambers, a circuit including all ofl said transmitters, a circuit for each ci' said chimes, means for completing a circuit to op# erate any one ci said chimes, said transmitter responsive to the operation of any chime to transa mit the tone emitted therefrom over tlie circuit including all of said transmitters.

6. In combination, a plurality of rew lays, a `sequence switch for controlling the opEJ eration ci? each of said transfer relays in proper sequence, a plurality ci registers arranged to perform successive controlling operations, and means controlled by said transfer relays ior making said registers eilective to perform said controlling operations in proper sequence.

7. In combination, a plurality of transfer relays, a sequence switch for controlling the opera tion of each ci said transfer relays in proper sequence, a plurality oi registers arranged to perform successive controlling operations, ineens controlled by said transierrclay for matting registersV effective to perform said con cperations in proper sequence, an impulse er, plurality ci? counting relays, conn trailed by sal-d impulse vsender counting relays rer cperating said sequence switch. ancre determined inter el i t. In a time signaling system, a pl time registers, clock controlled means said registers, a plurality ci c having ditferent tene, a resonance cnn ii transmitter dan @een er einem reality ci r setting chimes, and means for operating ci said means torkgperatingsaid chimes in accordance with the eettingcf the said registerarespectively,

ted by said chimes to said subscribers' stations.

10. In a time signaling'system, a plurality ,of

subscribersvstations, a. plurality of registers, au

tomatic means for changing the setting `of lsaid registers in accordance with the passage of time,

and means for transmitting the tone signals' emit-4 a likey plurality of chimes,\,means for operating said chimes in accordance with the setting of said registers, respectively, and a resonance chamber and transmitter associated with each' of 4said chimes for transmitting the tone, emitted when said chimes are operatedto said subscribers stations.

il.. In combination, a plurality of transfer relays, a plurality ,of time registers, a like plurality ci' impulse senders each transmitting impulses at a different speed,` and means controlled by said transfer relays for connecting said impulse senders to control said registers', respectively.`

l2. In a time signaling device, a plurality of registers for registering the time or day, a display panel visually indicating the time registered by said registers, and a transmitting device transmitting tone signals indicating the time regis tered by said registers.

i3. ln a time signaling system, a transmitting device for transmitting tone signals indicative ci the time oi day, -a plurality of trunk circuits f/or connecting subscribers to said transmitting device, a start circuit for said device, and means for maintaining said start circuit closed as long as a subscriber is connected to said transmitting device.

la. In a time 'signaling device arranged to transmit signals indicative ofl the time of day, means for transmitting signals indicative of vthe hour at one speed, means for transmitting signals indicative of the group of minutes at a faster speed, and means for transmitting signals indicativeoi the minute within the group at a stili i'aster speed.

l5. In combination, a plurality of tone signals, an interrupter for each of said tone signals, each o said interrupters operating at a diierent predetermind speed, and means for connecting any one or said interrupters to control any one or all of said tone signals.

i6. in a time signaling system, a plurality' of registers for registering the time oi day, means ier transmitting signals indicative ci tne time on said registers, means for disconn meeting said transmitting means when said registers are positioned topredetermined settings, and

for transmitting a special signal indicative j ci the predetermined settings of said registers.

li'. ln a time signaling` system, a plurality of registers ier registering the time oi day, means for transmitting signals indicative oi the time regis tered on said registers, means for disconnecting said transmitting means when said registers are positlcned to predetermined settings, means i'or 'transmitting a special signal indicative of tine predetermined settings of said registers, and means for varying the 'duration of sai/cl special le. In combination, a plurality ci transfer re lays, a sequence switch, a plurality of registers arranged to periorm successive controlling cperau tiene, means for controlling said sequence switch tc operate said transfer relays in sequence, means controlled by said transfer relays for making each oi' said'registers eifective to perform said controlling operations in proper sequence, and means ico 19. In a time signaling system, a plurality of impulse senders each transmitting impulses at a 'different speed, a plurality of registers for registering ythe time of day, a plurality of chimes, a

plurality of "counting relaysfor controlling the operation of said chimes, and means for connecting each of said impulse senders in turn to successively control said counting relays.

20. In a time signaling system, a register for registering the hours, a register for registering the the minutes, a chime for each of said registers,

. means for operating one of said chimes under control of the hours register, means for subsequently operating the other chime under control yas o'f the minutes register, and means for connecting said chimes so they are alternately controlled by said hours register and are subsequently alternately controlled by said minutes register.

2l. In a time signaling device, a register, comprising a step-by-step rotary switch and a plurality of relays, means for progressively operating said rotary switch step-oy-step to register certain hours oi" the day, 'and means for subsequently progressively operating said relays to register the remaining hours of the day.

22. In a time signaling device, a step-by-step rotary switch, means for progressively operating said rotary switch step-by-step to register certain hours yof the day, and a plurality oi relays fory registering the remaining hours 'of the day progressively operated after said rotary switch is operated to a predetermined position 23. In a time signaling system, a plurality of switches for registering the time of day, means for advancing the wipers of said switches to register the time, transmitting apparatus, a calling subscriber, means controlled by said subscriber for causing said-apparatus to transmit the time registered, and means responsive when said calling subscriber releases when only a portion of the time registeredhas been transmitted for restoring the transmitting apparatus to its normal starting position.

24. In a time signaling device, a plurality of switches for registering the time of day, means for giving them a continuous forward step-bystep movement, means for transmitting tone signals indicative of. the time registered on saidA continuously operating time registering device, a transmitting apparatus for transmitting the time registering thereon, automatic progressively movable means controlled by a calling subscriber for establishing a connection between any of said` sive to a connection for starting the transmitting apparatus to transmit the time registered, and means responsive' when said connection is released for causing said transmitting apparatus to restore to its original starting position.

.27. In a telephone system, a plurality of sound producing devices, automatic means for operating said devices at predetermined intervals in accordance with the time of day to simulate the striking of a clock, a microphone associated with each device for translatingthe sound emitted therefrom into electrical current variations, a circuit in which said current variations are manifested, and means controlled by a subscriber of the exchange for connecting his line with said circuit.

28..Iny a time signaling system, a plurality of registers, means for automatically resetting said registers at regular intervals so that at any given time the combined setting will be in accordance picking up said sounds and for translating thev same into electrical current variations, a circuit for said current variations, means controlled by a calling subscriber for establishing a connection to receive said current variations, and means at the subscribers station controlled by said current variations for reproducing the characteristic sounds. f1

HARRYl E. HERSHEY. 

